12x12 barn shed plans - free PDF download, material list. and drawings. DIY projects at Construct101

12×12 Barn Shed Plans – With Overhang – Free PDF

12×12 barn shed plans – with overhang – plans include a free PDF download, shopping list, cutting list, measurements, and step-by-step drawings.

12×12 Barn Shed Plans – Overview

12×12 Barn Shed Plans – Material List

Shopping List

Shopping List

Material for door and window was not added to this list.

Step 1 – Floor

  • 12 – 2×6 pressure treated – 12′
  • 4 – 4×4 pressure treated – 12′
  • 5 – 3/4″ tongue and groove plywood – 4’x8′ sheet

Step 2 – Walls

  • 12 – 2×4 – 12′
  • 48 – 2×4 – 8′

Step 3 – Truss – Rafters

  • 24 – 2×6 – 10′
  • 2 – 1/2 plywood – 4’x8′ sheet
  • 2 – 2×4 – 8′
  • 1 – 2×6 – 16′

Step 4 – Siding

  • 14 – 2×4 – 8′
  • 18 – T1-11 exterior siding – 4’x8′ sheet

Step 5 – Roof Deck

  • 4 – 2×4 – 8′
  • 10 – 1/2″ plywood – 4’x8′ sheet

Step 6 – Shingles – Trim

8 – 1×4 – 8′

Hardware

  • 3 1/2″ galvanized nails
  • 2″ deck screws
  • 2″ galvanized nails
  • 2″ galvanized finishing nails
  • shingles
  • roof tacks
  • roofing felt
  • staples
  • drip edge

Cutting List

Cutting List

Material for door and window was not added to this list.

Step 1 – Floor

  • 2 – 2×6 pressure treated – 12′
  • 10 – 2×6 pressure treated – 11′ 9″
  • 4 – 4×4 pressure treated – 12′
  • 5 – 3/4″ tongue and groove plywood – 4’x8′ sheet (cut to size)

Step 2 – Walls

  • 6 – 2×4 – 12′
  • 6 – 2×4 – 11′ 5″
  • 48 – 2×4 – 7′ 6″

Step 3 – Truss – Rafters

  • 48 – 2×6 – 5′ (22.5-degree angle cut on both ends in the opposite directions)
  • 36 – 1/2 plywood – 1’4″ x 9 5/16″ (gussets, cut to size)
  • 2 – 2×4 – 5′ 2 13/16″
  • 1 – 2×6 – 14′ 8″

Step 4 – Siding

  • 12 – 2×4 – 8′ (cut to size)
  • 18 – T1-11 exterior siding – 4’x8′ sheet (cut to size)
  • 2 -2×4 – 8′ (blocking, cut to size)
  • 1 – 1/2″ plywood or siding – (cut to size)

Step 5 – Roof Deck

  • 16 – 2×4 – 1′ 9 3/4″
  • 10 – 1/2″ plywood – 4’x8′ sheet (cut to size)

Step 6 – Shingles – Trim

8 – 1×4 – 8′ (cut to size)

  • Step 1 – Floor

12x12 barn shed plans - floor frame.

The shed floor frame is built using pressure treated 2×6 and 4×4 lumber.

Cut two 2×6’s to 12′ long for the floor band. Cut ten 2×6’s to 11′ 9″ for the floor joist. Use 3 1/2 nails to assemble the floor frame. Floor joist will be 16″ O.C., assemble the floor frame as shown in illustration above.

Install the 4×4 – 12′ long skids to the bottom of the floor frame. Toenail 3 1/2″ nails through the floor frame and into the 4×4 skids.

Square the floor frame by measuring diagonally until both sides measure the same.

12x12 barn shed plans - floor deck.

Measure and cut to size the floor deck. Install the 3/4″ tongue and groove plywood for the floor deck. Install the plywood floor using 2″ deck screws. Screw through the plywood deck floor and into the floor frame.

  • Step 2 – Walls

The shed wall frames are built using 2×4 lumber.

12x12 barn shed plans - side walls.

Instructions for the side wall frames.

Cut four 2×4’s to 12′ long for the bottom and top plate. Cut two 2×4’s to 11′ 5″ long for the top double plate. Cut twenty eight 2×4’s to 7′ 6″ long for the wall studs.

Wall studs are spaced out 16″ O.C., assemble the side wall frame as shown on illustration above using 3 1/2″ nails.

Framing Door and Window

See the following pages for instructions on framing details for door and window:

Door Instructions

Window Instructions

12x12 barn shed plans - side wall frame close up look.

Illustration above shows a close up on the side wall frame ends.

12x12 barn shed plans - front and back wall frame.

Instructions for the front and back wall frames.

Cut four 2×4’s to 11′ 5″ long for the bottom and top plate. Cut two 2×4’s to 12′ long for the double top plate. Cut twenty 2×4’s to 7′ 6″ long for the wall studs.

Assemble the front and back wall frame as shown on illustration above using 3 1/2″ nails.

Framing Door and Window

See the following pages for instructions on framing details for door and window:

Door Instructions

Window Instructions

  • Step 3 – Truss – Rafters

The shed trusses are built using 2×6 lumber.

Cut and assemble one truss set, once you get a good fit use it as a template to build the rest.

12x12 barn shed plans - truss details.

The illustration above shows the details for the shed truss parts.

12x12 barn shed plans - upper and lower chord.

Cut forty-eight 2×6’s to 5′ long for the top and bottom chord rafters and roof trim. Cut 22.5-angle cuts on both ends in the opposite directions, see illustration above for details.

12x12 barn shed plans - lower chord, rafter end details.

Cut the ends on twenty of the rafters as shown on illustration above for the rafter lower chords.

12x12 barn shed plans - truss gusset.

To assemble the roof truss cut out thirty-six gussets as shown on illustration above using 1/2″ plywood.

12x12 barn shed plans - rafters and gusset assembly.

Assemble the top chord and lower rafter chord as shown on illustration above using 2″ nails.

12x12 barn shed plans - ridgeboard.

Cut two 2×4’s to 5′ 2 13/16″ long. Cut one 2×6 to 14′ 8″ long. Assemble the ridge board as shown on illustration above using 3 1/2″ nails.

12x12 barn shed plans - truss frame.

The roof trusses are spaced out 16″ O.C., assemble using 3 1/2″ nails.

  • Step 4 – Siding

12x12 barn shed plans - front and back top wall studs.

Cut twelve 2×4’s to size for the front and back top wall studs. Notch the top of the 2×4’s around the rafters and install using 3 1/2″ nails.

12x12 barn shed plans - siding.

Install the siding as shown on illustration above using 2″ finishing nails.

12x12 barn shed plans - 2x4 blocking.

Measure and cut 2×4’s and plywood or siding to size to close the opening between the roof deck and walls. Install as shown on illustration above.

  • Step 5 – Roof Deck

12x12 barn shed plans - 2x4 outriggers.

The front and back of the barn shed will have an 8″ overhang.

To make the overhang cut sixteen 2×4’s to 1′ 9 3/4″ long for the outriggers. To install the 2×4 outriggers notch the rafters and siding as shown on illustration above and secure with 3 1/2″ nails.

12x12 barn shed plans - roof trim.

Nail the remaining rafters to the 2×4 outriggers using 3 1/2″ finishing nails. The rafters will be used as the front and back roof trim.

12x12 barn shed plans - roof deck.

Measure and cut 1/2″ plywood for the roof deck. Install the roof deck using 2″ nails.

  • Step 6 – Shingles and Trim

12x12 barn shed plans - shingles and trim.

Cut 1×4’s to size for the corner trim, install using 2″ finishing nails.

Install roofing felt, drip edge, and shingles.

Like these 12×12 barn shed plans? Let me know, leave me a comment below. Share this link with your friends and your social media, thanks.
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19 comments

  1. These plans are good. I love them wish i had time and money to build all.

  2. Do you have this style shed in a 12 x 16. I know I can just add 4 feet, but it changes the shopping list and cut list.

    Thanks

  3. Thanks a lot.
    Finally FreePlans that aren’t clickbait!

  4. This is amazing. It is just what my father needed! We are getting goats and chickens so a good shelter is required. We are going to put both goats and chickens into the building for shelter from predator’s who are rarely seen. If you are a person reading this comment who is starting to raise animals I highly recommend this shelter to keep your animals safe!

  5. I would love a copy of the 12×16 plans if you have them. Thank you

  6. Hello,
    Do you have a plan for a double car garage based on your 12 x 12 barn style shed

  7. I would also like to have the 12’ X 16’ plans if possible. Thank you. These plans are terrific.

  8. Your plans are awesome, thank you so much. I’m weighing in for a 12′ X 16′ plan of this one 🙂

  9. Michael Helland

    Same here! I need a 12’ X 16’ as well.

  10. darrell martin

    Perfect plans and shopping list. I need something for a 12×16. Do you have anything?

  11. Do think we can get a more detailed plan for the double doors?

    • What is the angle cut on the rafter lower chords?

      • Both ends are 22.5 degrees because the top of the wall and the ridge board make a 90degree angle thus both ends of the upper and lower rafters are 22.5. so in theory 22.5 +22.5+22.5+22.5+22.5=90 degrees

    • I’m in the middle of building this 12×12 barn. It says to cut the rafter PC’s to 5 ‘ each I made one to test and found out that with two 5′ sections it takes it to 6′ on center which leaves a gap on the side. In other words it doesn’t leave you the room for the ridge board. So I guess I have to make a decision here. Either I build without the ridge board and make more gussets or I cut the upper rafter board to 4′ 11 1/4″ to compensate for the ridge board. Just another thought…. Instead of notching the siding around the over hang maybe I’ll cut the upper rafter 4’ 11 3/4″ so I have a gap behind the over hang to slide my siding under.

  12. Great plans. What would the dimensions of the rafter pieces be if I increased the width of the building to 14 feet?

  13. I am right in the middle of a building this shed. I lost half a day trying to figure out the problem with the rafters. It finally dawned on me to cut 3/4 of an inch off each top beam. That squared it all up beautifully. Other than that little snafu, the plans have been wonderful.

  14. What size are the doors. Why no dimensions. Can u supple dimensions for single & double door please. My first time doing a project of this scale.

    Many thanks

    Kelly

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